marginal significanceP = 0.061
The cetuximab → bevacizumab group also had longer OS than the bevacizumab → cetuximab group among patients with right‐sided tumors with marginal significance (HR: 95% CI:, P = 0.061), which is contradictory to the relationship between sidedness and EGFR first‐line treatment efficacy elucidated in several randomized trials. 29 This might be attributable to selection bias in our study, in that patients with right‐sided colon tumors that had higher surviva